Amongst others it means that you need to implement adequate technical means to protect the data, and put the necessary security measures in place.

Another point tells you to limit who has access to that data, ensuring that data is accessed only on a need-to-know basis. For example, the receptionist needs to know the name and company of customers who will visit the company today, but does not need to have access to their credit card data. The IT technician needs to know names and user access rights to perform his duties, but not confidential financial data.

Speaking of which, most companies' IT departments are a serious risk to security. Developers need to be able to develop their software and to do so, need access to code and data. Often this means that they have not only access to test data on test servers but also to real data on production servers.

They implement easy to remember user accounts - so called super users - which give them access to every part of the applications and databases, even the most confidential. These are rarely changed and are accessible to the complete development team, not to a specific developer. This also means that when a developer or IT consultant leaves the company, the password is not changed, and possibly the developer would still have access to sensitive personal data entrusted to the company.

According to Cyber-Ark, 9 out of 10 disgruntled IT staff would steal confidential or proprietary data from their former employer. The article on Contractor UK further states that one third of leavers would take lists with 'super user' passwords, giving them access to all kinds of sensitive company and personal data. Only 12% would be honest and leave empty handed, leaving all company confidential data behind.

Companies are required to ensure that the personal data entrusted to them is adequately protected, so this is certainly an issue they need to address. Do take note that implementing high security measures to secure personal and sensitive data is not sufficient as grudging staff will find a way to bypass these security measures.